A lighting fixture and a method for adjusting light and color thereof

Abstract

The present invention belongs to the field of electronic circuit technology, and provides a lighting fixture and a dimming and color adjustment method thereof, wherein the lighting fixture is connected to the main power supply through a wall switch, and the lighting fixture includes at least two light-emitting modules, a main control module and a detection module, and each time the detection module detects that the wall switch is in action, and the action duration is within a preset time, a corresponding adjustment signal is output to the main control module, and the adjustment signal is used to instruct the main control module to linearly adjust the magnitude of the total output current and adjust the current ratio of each light-emitting module, so as to drive the light-emitting module to emit light with a constant current. Thus, by detecting the short-term closing signal of the wall switch, the dimming and color adjustment signal is controlled, so as to achieve the effect of changing the brightness and color temperature of the light-emitting module, and solves the problem that the existing lighting technology of lamps and lanterns adopts the method of turning on or off the wall switch to control the lighting and extinguishing of the light source, and this method can only control the lighting of the light source, and cannot perform dimming and color adjustment.

Description

Technical Field

[0001] The present invention belongs to the technical field of electronic circuits, and in particular relates to a lighting fixture and a light adjustment and color adjustment method thereof. Background Art

[0002] Existing lighting fixtures usually use a wall switch to turn on or off to control the lighting and extinguishing of the light source. This method can only control the lighting and extinguishing of the light source, but cannot perform dimming and color adjustment, and has a low level of intelligence.

[0003] Therefore, the existing lighting technology of lamps and lanterns has the problem that the lighting and extinguishing of the light source are controlled by turning on or off the wall switch, but this method can only control the lighting and extinguishing of the light source, and cannot perform dimming and color adjustment. Summary of the invention

[0004] The purpose of the present invention is to provide a lighting fixture and a method for dimming and adjusting the light, aiming to solve the problem that the existing lighting technology of lighting fixtures uses a wall-controlled switch to turn on or off to control the lighting and extinguishing of the light source. This method can only control the lighting and extinguishing of the light source, but cannot perform dimming and color adjustment.

[0005] A first aspect of the present invention provides a lighting fixture, which is connected to a mains supply via a wall switch, and comprises:

[0006] A main control module connected to at least two light-emitting modules, for linearly adjusting the magnitude of the total output current and adjusting the current ratio of each light-emitting module according to the received adjustment signal, so as to drive the light-emitting modules to emit light with a constant current; and

[0007] The detection module is connected to the wall-controlled switch and the main control module, and is used to output the adjustment signal to the main control module accordingly each time the wall-controlled switch is detected to be in action and the action duration is within a preset time.

[0008] Therefore, by detecting the short-term closing signal of the wall control switch, the dimming and color adjustment signal is controlled, so as to achieve the effect of changing the brightness and color temperature of the light-emitting module.

[0009] In one embodiment, it also includes:

[0010] A rectifier module, connected to the wall switch and the main control module, for rectifying the AC signal output by the mains; and

[0011] The power supply module is connected to the rectifier module, the main control module and the detection module, and is used to convert the rectified AC signal into a constant voltage using a switching power supply to power the detection module and the main control module. Therefore, the detection module and the main control module can be powered by only processing the AC signal output by the mains, without the need for an external power supply, thus saving energy.

[0012] In one embodiment, the main control module includes any one of a buck circuit, a boost circuit, a buck-boost circuit, and a flyback circuit. This embodiment limits the linear characteristics of the main control module.

[0013] In one embodiment, the detection module includes:

[0014] A second diode, a fifth capacitor, a tenth resistor, an eleventh resistor and a dimming chip;

[0015] The cathode of the second diode is connected to the reference voltage, the anode of the second diode is connected to the first end of the tenth resistor and the first end of the eleventh resistor, the second end of the tenth resistor is connected to the first end of the fifth capacitor and the serial port end of the dimming chip, and the second end of the eleventh resistor is connected to ground. This embodiment defines the specific circuit structure of the detection module.

[0016] A second aspect of the present invention provides a dimming and color adjustment method for a lighting fixture, wherein the lighting fixture is connected to a mains supply via a wall switch, and the lighting fixture includes at least two light-emitting modules, and the dimming and color adjustment method includes:

[0017] The detection module detects that the wall switch is in action each time, and the action duration is within a preset time, and outputs an adjustment signal accordingly;

[0018] The main control module linearly adjusts the magnitude of the total output current and the current ratio of each light-emitting module according to the received adjustment signal, so as to drive the light-emitting module to emit light with a constant current.

[0019] Therefore, the dimming and color adjustment method is adopted to control the dimming and color adjustment signal by detecting the short-term closing signal of the wall switch, thereby achieving the effect of changing the brightness and color temperature of the light-emitting module.

[0020] In one embodiment, it also includes:

[0021] When the wall switch is detected to be in action for the first time, the magnitude of the total output current and the current ratio of each light-emitting module are controlled to be consistent with the parameters saved before the light-emitting module is powered off. This embodiment defines that when the wall switch is powered on for the first time after being powered off for a long time, the light-emitting module operates at the brightness and color temperature saved last time.

[0022] In one embodiment, the detection module detects the wall switch and performs an action each time, including:

[0023] When the action of the wall switch is detected, timing is started, and the magnitude of the total output current is cyclically adjusted by the main control module within a first preset time range;

[0024] If the wall switch is detected to be actuated again within the first preset time range, the main control module is controlled to lock the current total output current and restart the timing. This embodiment defines the specific implementation process of dimming.

[0025] In one embodiment, cyclically adjusting the magnitude of the total output current by the main control module within the first preset time range includes:

[0026] The total current output by the main control module is controlled to cycle from large to small or from small to large for N cycles, where N is a positive integer.

[0027] In one embodiment, if the wall switch is detected to be actuated again within the first preset time range, the main control module is controlled to lock the current total output current and restart the timing, and then the method further includes:

[0028] Cyclically adjusting the current ratio of each light-emitting module through the main control module within a second preset time range;

[0029] If the wall switch is detected to be actuated again within the second preset time range, the main control module is controlled to lock the current ratio of each of the light-emitting modules. This embodiment defines the specific implementation process of color adjustment.

[0030] In one embodiment, cyclically adjusting the current ratio of each light-emitting module by the main control module within the second preset time range includes:

[0031] The main control module is controlled to output a current ratio of each light-emitting module from large to small or from small to large for M cycles, where M is a positive integer.

[0032] The present invention provides a lighting fixture and a dimming and color adjustment method thereof. The lighting fixture is connected to the mains through a wall switch, and the lighting fixture includes at least two light-emitting modules, a main control module and a detection module. Each time the detection module detects that the wall switch is in action and the action duration is within a preset time, an adjustment signal is output to the main control module accordingly. The adjustment signal is used to instruct the main control module to linearly adjust the magnitude of the total output current and adjust the current ratio of each light-emitting module to drive the light-emitting module to emit light with a constant current. Thus, by detecting the short-term closing signal of the wall switch, the dimming and color adjustment signal is controlled, so that the light-emitting module changes the brightness and color temperature, thereby solving the problem that the existing lighting technology of the lighting fixture adopts the method of turning on or off the wall switch to control the lighting and extinguishing of the light source, and this method can only control the lighting of the light source, but cannot perform dimming and color adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of a module structure of a lighting fixture provided by one aspect of the present invention.

[0034] Figure 2 It is another schematic diagram of a module structure of a lighting fixture provided by one aspect of the present invention.

[0035] Figure 3 It corresponds to Figure 2 An example circuit diagram of a power supply module in a lighting fixture is provided.

[0036] Figure 4 It corresponds to Figure 2 An exemplary circuit diagram of a lighting fixture provided by an embodiment.

[0037] Figure 5 It corresponds to Figure 2 Another embodiment provides an exemplary circuit diagram of a lighting fixture.

[0038] Figure 6 It corresponds to Figure 2 Yet another embodiment provides an example circuit diagram of a lighting fixture.

[0039] Figure 7 It is a schematic flow chart of the steps of a method for dimming and adjusting the color of a lighting fixture provided by another aspect of the present invention.

[0040] Figure 8 It corresponds to Figure 7 A flowchart showing the specific steps of step S101 of a method for dimming and color adjusting a lighting fixture.

[0041] Fig. 9 It is a schematic diagram of the principle of a method for dimming and adjusting the color of a lighting fixture provided by another aspect of the present invention. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0043] Figure 1 A module structure of a lighting fixture provided by one aspect of the present invention is shown. For the sake of convenience, only the parts related to this embodiment are shown, which are described in detail as follows:

[0044] A lighting fixture is used to access a mains electricity 101 through a wall switch 102 . The lighting fixture comprises at least two light-emitting modules 104 , a main control module 103 and a detection module 105 .

[0045] Among them, the detection module 105 is connected to the wall switch 102 and the main control module 103, and is used to output an adjustment signal to the main control module 103 each time it detects that the wall switch 102 is in action and the action duration is within a preset time. And the main control module 103 is connected to at least two light-emitting modules 104, and is used to linearly adjust the magnitude of the output total current and adjust the current ratio of each light-emitting module 104 according to the received adjustment signal, so as to drive the light-emitting module 104 to emit light with a constant current. It should be understood that the light-emitting module 104 includes a high color temperature and a low color temperature, and the color adjustment effect can be achieved by adjusting the current ratio of different light-emitting modules 104.

[0046] Thus, by detecting the short-term closing signal of the wall switch 102, the dimming and color adjustment signal is controlled, thereby achieving the effect of dimming and color adjustment of the light module 104. This method is simple and easy, and the brightness and color temperature of the light module 104 can be adjusted by only pressing the wall switch 102; and the detection module 105 and the main control module 103 are added, without the need for a remote control or other control equipment, and the dimming requirements of the light module 104 are realized by the customer at the lowest cost. Among them, each light module 104 includes a series of LED light strings.

[0047] For example, when the first short power failure (within 2S) of the wall control switch 102 is detected, the total current output by the main control module 103 changes slowly from low to high and then to low, and automatically cycles for 3 cycles. When the short power failure (within 2S) of the wall control switch 102 is detected again during the output gradual change cycle, the output is locked. If the short power failure (within 2S) of the wall control switch 102 is not detected again during the output gradual change cycle, the brightness saved last time is restored. In this way, the brightness of the light-emitting module 104 can be adjusted by the short power failure of the wall control switch 102.

[0048] When the wall switch 102 is detected to be temporarily powered off for the third time (within 2S), the output current ratio of each light-emitting module 104 is slowly changed from low to high and then to low, and three cycles are automatically repeated; when a temporary power failure is detected again within the output gradual change cycle (within 2S), the output is locked. If a temporary power failure is not detected again within the output gradual change cycle (within 2S), the color temperature saved last time is restored. In this way, the color temperature of the light-emitting module 104 is adjusted by the temporary power failure of the wall switch 102.

[0049] Specifically, the main control module 103 includes any one of a buck circuit, a boost circuit, a buck-boost circuit, and a flyback circuit. It should be understood that since the main control module 103 adjusts the total output current or the current ratio of each light-emitting module 104 to directly control the brightness of the LED light string, any one of a buck circuit, a boost circuit, a buck-boost circuit, and a flyback circuit can be used to adjust the total output current or the current ratio of each light-emitting module 104.

[0050] Figure 2 Another module structure of a lighting fixture provided by one aspect of the present invention is shown. For the sake of convenience, only the parts related to this embodiment are shown, which are described in detail as follows:

[0051] exist Figure 1 Based on the illustrated embodiment, the lighting fixture further includes a rectifier module 106 and a power supply module 107 .

[0052] The rectifier module 106 is connected to the wall switch 102 and the main control module 103, and is used to rectify the AC signal output by the main power 101. The power supply module 107 is connected to the rectifier module 106, the main control module 103 and the detection module 105, and is used to convert the rectified AC signal into a constant voltage using a switching power supply to power the detection module 105 and the main control module 103.

[0053] Specifically, the detection module 105 and the main control module 103 can be powered by only processing the AC signal output by the mains 101, without the need for an external power supply, thus saving energy.

[0054] Figure 3 Shows the corresponding Figure 2 An example circuit of a power supply module in a lighting fixture is provided. For ease of explanation, only the part related to this embodiment is shown, which is described in detail as follows:

[0055] As an embodiment of the present invention, the power supply module 107 includes a third diode D3, a fourth diode D4, a fifth diode D5, a second voltage stabilizing capacitor CD2, a third voltage stabilizing capacitor CD3, a third inductor L3, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a sixth capacitor C6 and a switching power supply chip U2.

[0056] The anode of the third diode D3 is connected to the main control module 103, the cathode of the third diode D3 and the first end of the second voltage-stabilizing capacitor CD2 are connected to the enable end DRAN of the switching power chip U2, the first end of the twelfth resistor R12 and the first end of the thirteenth resistor R13 are connected to the chip select end CS of the switching power chip U2, the cathode of the fourth diode D4 and the first end of the sixth capacitor C6 are connected to the voltage end VCC of the switching power chip U2, the second end of the sixth capacitor C6, the second end of the twelfth resistor R12, the second end of the thirteenth resistor R13, the cathode of the fifth diode D5 and the first end of the third inductor L3 are connected in common, the anode of the fourth diode D4, the second end of the third inductor L3, the first end of the third voltage-stabilizing capacitor CD3 and the first end of the fourteenth resistor R14 are connected in common and connected to the detection module 105, and the second end of the second voltage-stabilizing capacitor CD2, the anode of the fifth diode D5, the third voltage-stabilizing capacitor CD3 and the second end of the fourteenth resistor R14 are grounded.

[0057] Figure 4 Shows the corresponding Figure 2 An exemplary circuit of a lighting fixture provided in an embodiment, for the sake of convenience of description, only the part related to this embodiment is shown, which is described in detail as follows:

[0058] As an embodiment of the present invention, the above-mentioned main control module includes a main control chip U1, a second resistor R2, a third resistor R3, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first capacitor C1, a fourth capacitor C4, a first voltage stabilizing capacitor CD1, a first diode D1 and a second inductor L2.

[0059] The first end of the second resistor R2, the cathode of the first diode D1, the first end of the third resistor R3 and the first end of the first voltage-stabilizing capacitor CD1 are connected in common, the second end of the second resistor R2 is connected to the first end of the first capacitor C1, the second end of the first capacitor C1 is connected in common with the anode of the first diode D1 and the first end of the second inductor L2, and is connected to the enable end DRAN of the main control chip U1, the second end of the second inductor L2 is connected to the second end of the third resistor R3, the first end of the fifth resistor R5 is connected to the overvoltage protection end OVP of the main control chip U1, the first end of the fourth capacitor C4 is connected in common with the first end of the sixth resistor R6 and the pulse end PWM of the main control chip U1 and accesses the adjustment signal, the first end of the seventh resistor R7 and the first end of the eighth resistor R8 are connected to the chip select end CS of the main control chip U1, the second end of the fifth resistor R5, the second end of the sixth resistor R6, the second end of the seventh resistor R7, the second end of the eighth resistor R8 and the second end of the fourth capacitor C4 are grounded.

[0060] As an embodiment of the present invention, the detection module 105 includes a second diode D2 , a fifth capacitor C5 , a tenth resistor R10 , an eleventh resistor R11 , and a dimming chip U3 .

[0061] The cathode of the second diode D2 is connected to the reference voltage VDD, the anode of the second diode D2 is connected to the first end of the tenth resistor R10 and the first end of the eleventh resistor R11, the second end of the tenth resistor R10 is connected to the first end of the fifth capacitor C5 and the serial port IO of the dimming chip U3, and the second end of the eleventh resistor R11 and the second end of the fifth capacitor C5 are grounded.

[0062] As an embodiment of the present invention, the rectifier module 106 includes a rectifier bridge DB1.

[0063] Figure 5 Shows the corresponding Figure 2 Another embodiment provides an exemplary circuit of a lighting fixture. For ease of description, only the part related to this embodiment is shown, which is described in detail as follows:

[0064] As an embodiment of the present invention, Figure 4 The difference between the illustrated embodiments is that the main control module 103 lacks the first capacitor C1, and the connection structure of the second resistor R2, the third resistor R3, the second inductor L2, the first voltage stabilizing capacitor CD1 and the first diode D1 is different, specifically:

[0065] The first end of the second resistor R2, the first end of the second inductor L2, the first end of the third resistor R3 and the first end of the first voltage-stabilizing capacitor CD1 are connected in common, the second end of the second resistor R2 is connected to the high-voltage end HV of the main control chip U1, the anode of the first diode D1 is connected in common with the first end of the second inductor L2 and the enable end DRAN of the main control chip U1, and the second end of the third resistor R3 is connected in common with the cathode of the first diode D1 and the second end of the first voltage-stabilizing capacitor CD1.

[0066] Figure 6 Shows the corresponding Figure 2 Another embodiment provides an exemplary circuit of a lighting fixture. For ease of description, only the part related to this embodiment is shown, which is described in detail as follows:

[0067] As an embodiment of the present invention, Figure 4 The difference between the illustrated embodiments is that the main control module 103 lacks the first capacitor C1, and the connection structure of the second resistor R2, the third resistor R3, the second inductor L2, the first voltage stabilizing capacitor CD1 and the first diode D1 is different, specifically:

[0068] The first end of the second resistor R2 is connected to the first end of the second inductor L2, the second end of the second inductor L2 is connected to the anode of the first diode D1 and the enable end DRAN of the main control chip U1, the cathode of the first diode D1 is connected to the first end of the third resistor R3 and the first end of the first voltage-stabilizing capacitor CD1, the second end of the second resistor R2 is connected to the high-voltage end HV of the main control chip U1, and the second end of the third resistor R3 and the second end of the first voltage-stabilizing capacitor CD1 are grounded.

[0069] The following combination Figure 1-Figure 6 , the above-mentioned lighting fixture and the working principle of the lighting fixture are described as follows:

[0070] First, the wall-controlled switch 102 is used to connect to the mains power, and the input 50 / 60HZ sine wave voltage is converted into a 100 / 120HZ voltage waveform without a negative half-cycle through the rectifier bridge DB1. Then, the power supply module 107 converts the rectified voltage into a constant output voltage through a switching power supply and provides it to the detection module 105 and the main control module 103. When the detection module 105 detects a short OFF signal of the wall-controlled switch 102, a pulse width modulation signal (Pulse width modulation, PWM) is output, so that the main control module 103 controls the size of the total output current or adjusts the current ratio of each light-emitting module 104 according to the received PWM signal, so as to adjust the brightness and color temperature of the light-emitting module 104.

[0071] Figure 7 The step flow of a method for dimming and adjusting the color of a lighting fixture provided by another aspect of the present invention is shown. For the sake of convenience, only the part related to this embodiment is shown, which is described in detail as follows:

[0072] The present invention also provides a dimming and color adjustment method for a lighting fixture, wherein the lighting fixture is connected to the mains via a wall switch, and the lighting fixture comprises at least two light-emitting modules, and the dimming and color adjustment method comprises the following steps:

[0073] S101. Each time the detection module detects that the wall switch is in action and the action duration is within the preset time, the corresponding output adjustment signal is output;

[0074] S102. The main control module linearly adjusts the total output current and the current ratio of each light-emitting module according to the received adjustment signal, so as to drive the light-emitting module to emit light with a constant current.

[0075] It should be understood that the light-emitting module includes high color temperature and low color temperature, and the current ratio of different light-emitting modules can be adjusted to achieve the effect of color adjustment. Therefore, by detecting the short-term off signal of the wall control switch to control the dimming and color adjustment signal, the light-emitting module can be dimmed and adjusted. This method is simple and easy, and the brightness and color temperature of the light-emitting module can be adjusted by just pressing the wall control switch.

[0076] Specifically, the dimming and color adjustment method further includes the steps of:

[0077] When the wall switch is detected to be in action for the first time, the total output current and the current ratio of each light-emitting module are controlled to be consistent with the parameters saved before the light-emitting module is powered off. In this way, when the wall switch is powered on for the first time after being powered off for a long time, the light-emitting module works at the brightness and color temperature saved last time, which will not cause confusion in the internal program.

[0078] Figure 8 Shows the corresponding Figure 7 In the specific step flow of step S101 of a method for dimming and color adjustment of a lighting fixture, for the sake of convenience, only the part related to this embodiment is shown, which is described in detail as follows:

[0079] As an embodiment of the present invention, the above step S101 specifically includes the following steps:

[0080] S1011. When the wall switch is detected, the timing starts, and the total output current is cyclically adjusted by the main control module within the first preset time range;

[0081] S1012: If the wall switch is detected to be actuated again within the first preset time range, the main control module is controlled to lock the current total output current and restart the timing. This embodiment defines the specific implementation process of dimming.

[0082] Of course, if it is detected that the wall switch remains unchanged within the first preset time range, the brightness of the light-emitting module saved last time is restored. The first preset time range can be set according to actual needs, for example, the first preset time range is 5S-15S.

[0083] Exemplarily, cyclically adjusting the magnitude of the total output current by the main control module within the first preset time range includes:

[0084] The total current output by the main control module is controlled to cycle from large to small or from small to large for N cycles, where N is a positive integer.

[0085] As an embodiment of the present invention, the above step S101 specifically further includes the following steps:

[0086] S1013. The current ratio of each light-emitting module is cyclically adjusted by the main control module within the second preset time range;

[0087] S1014. If the wall switch is detected to be actuated again within the second preset time range, the main control module is controlled to lock the current ratio of each light-emitting module. This embodiment defines the specific implementation process of color adjustment.

[0088] Of course, if it is detected that the wall switch remains unchanged within the second preset time range, the color temperature saved by the light emitting module last time is restored. The second preset time range can be set according to actual needs, for example, the first preset time range is 5S-15S.

[0089] Exemplarily, cyclically adjusting the current ratio of each light-emitting module by the main control module within the second preset time range includes:

[0090] The main control module is controlled to output the current ratio of each light-emitting module in a manner of decreasing from large to small or decreasing from small to large for M cycles, where M is a positive integer.

[0091] Fig. 9 The principle of a method for dimming and adjusting the color of a lighting fixture provided by another aspect of the present invention is shown. For the sake of convenience, only the part related to this embodiment is shown, which is described in detail as follows:

[0092] First, when the wall switch is detected to be powered off briefly for the first time (within 2 seconds), the main control module adjusts the brightness signal PWM1 output to change slowly from low to high and then to low, and the brightness automatically cycles for 3 cycles;

[0093] When a second short power failure (within 2S) is detected during the brightness output gradual change cycle, the output brightness PWM1 signal is locked. If no short power failure (within 2S) is detected again during the output gradual change cycle, the previously saved brightness is restored;

[0094] When a short power failure is detected for the third time (within 2 seconds), the output color temperature signal PWM2 is slowly changed from low to high and then to low, and the color temperature automatically cycles for 3 cycles;

[0095] When the fourth short power failure (within 2S) is detected during the color temperature output gradient cycle, the output color temperature PWM2 signal is locked. If no short power failure (within 2S) is detected again during the brightness output gradient cycle, the previously saved color temperature is restored, and so on. Thus, by the above dimming and color adjustment method, the brightness and color temperature of the light-emitting module can be changed by simply pressing the wall control switch.

[0096] In summary, an embodiment of the present invention provides a lighting fixture and a dimming and color adjustment method thereof. The lighting fixture is connected to the mains power supply through a wall switch, and the lighting fixture includes at least two light-emitting modules, a main control module and a detection module. Each time the detection module detects that the wall switch is in action and the action duration is within a preset time, an adjustment signal is output to the main control module accordingly. The adjustment signal is used to instruct the main control module to linearly adjust the magnitude of the total output current and adjust the current ratio of each light-emitting module to drive the light-emitting module to emit light with a constant current. Thus, by detecting the short-term closing signal of the wall switch, the dimming and color adjustment signal is controlled, so as to achieve the effect of changing the brightness and color temperature of the light-emitting module, thereby solving the problem that the existing lighting technology of lamps and lanterns adopts the method of turning on or off the wall switch to control the lighting and extinguishing of the light source, and this method can only control the lighting of the light source, but cannot perform dimming and color adjustment.

[0097] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lighting fixture, connected to the mains via a wall switch, characterized in that: The lighting fixture comprises: A main control module connected to at least two light-emitting modules, for linearly adjusting the magnitude of the total output current and adjusting the current ratio of each light-emitting module according to the received adjustment signal, so as to drive the light-emitting modules to emit light with a constant current; wherein the light-emitting modules each include an LED light string; and A detection module is connected to the wall control switch and the main control module, and is used to output the adjustment signal to the main control module each time the wall control switch is detected to be in action and the action duration is within the preset time, including: starting timing after the action of the wall control switch is detected, and controlling the total current output by the main control module to cycle N cycles from large to small or from small to large within a first preset time range, where N is a positive integer; if the wall control switch is detected to be in action again within the first preset time range, the main control module is controlled to lock the current total output current and restart timing; within a second preset time range, the main control module cyclically adjusts the current ratio of each light-emitting module; if the wall control switch is detected to be in action again within the second preset time range, the main control module is controlled to lock the current current ratio of each light-emitting module.

2. The lighting fixture according to claim 1, characterized in that: Also includes: A rectifier module, connected to the wall switch and the main control module, for rectifying the AC signal output by the mains; and The power supply module is connected to the rectifier module, the main control module and the detection module, and is used to convert the rectified AC signal into a constant voltage using a switching power supply to power the detection module and the main control module.

3. The lighting fixture according to claim 1, characterized in that: The main control module includes any one of a buck circuit, a boost circuit, a buck-boost circuit and a flyback circuit.

4. The lighting fixture according to claim 1, characterized in that: The detection module comprises: A second diode, a fifth capacitor, a tenth resistor, an eleventh resistor and a dimming chip; The cathode of the second diode is connected to a reference voltage, the anode of the second diode is connected to the first end of the tenth resistor and the first end of the eleventh resistor, the second end of the tenth resistor is connected to the first end of the fifth capacitor and the serial port end of the dimming chip, and the second end of the eleventh resistor and the second end of the fifth capacitor are grounded.

5. A method for dimming and adjusting the color of a lighting fixture, wherein the lighting fixture is connected to the mains via a wall switch and comprises at least two light-emitting modules, characterized in that: The dimming and color adjustment method comprises: Each time the detection module detects that the wall-controlled switch is in action and the action duration is within a preset time, a corresponding adjustment signal is output, including: starting timing after the action of the wall-controlled switch is detected, and controlling the magnitude of the total current output by the main control module from large to small or from small to large to cycle N cycles within a first preset time range, wherein N is a positive integer; if the wall-controlled switch is detected to be in action again within the first preset time range, the main control module is controlled to lock the magnitude of the current total output current and restart timing; within a second preset time range, the main control module is used to cyclically adjust the magnitude of the current ratio of each of the light-emitting modules; if the wall-controlled switch is detected to be in action again within the second preset time range, the main control module is controlled to lock the magnitude of the current ratio of each of the light-emitting modules; The main control module linearly adjusts the total output current and the current ratio of each light-emitting module according to the received adjustment signal, so as to drive the light-emitting modules to emit light with a constant current; wherein the light-emitting modules all include LED light strings.

6. The light adjustment and color adjustment method according to claim 5, characterized in that: Also includes: When the wall switch is detected to be in action for the first time, the magnitude of the total output current and the current ratio of each light-emitting module are controlled to be consistent with the parameters saved before the light-emitting module is powered off.

7. The light adjustment and color adjustment method according to claim 5, characterized in that: Cyclic adjustment of the current ratio of each light-emitting module by the main control module within the second preset time range includes: The main control module is controlled to output a current ratio of each light-emitting module from large to small or from small to large for M cycles, where M is a positive integer.

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